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Across 6. The SI unit of Force 8. This force is always parallel to the motion 11. A simple sketch of all objects involved in a (scientific) situation (2 words, no spaces) 12. contact force that resists the motion or attempted motion of an object 13. A fundamental force that is responsible for energy in atomic reactions in bombs and stars (2 words, no space) 16. The strength of a quantity. (This is the # (4) in 4 m/s.) 17. A fundamental force with infinite range, and 20 times stronger than the force of Gravity 19. When an object sits or rests on a surface, this force is perpendicular to the object and the surface (2 words, no spaces) 21. The weakest of the 4 fundamental forces 23. The weakest of the 4 fundamental forces 25. the unit for force calculations in physics (like your Weight) 26. The strongest of the 4 fundamental forces 27. The Sum of all Forces (2 words, __ force) 28. When calculating forces, the mass must be in ________________ (hint: a unit of mass) 29. When you calculate an average, you should take the sum of all #'s(entries), and then _____ the total by # of entries 30. A pulling force exerted on an object by a rope or a string

Down 1. the study of the causes of motion 2. A contact force where one object either pulls or pushes on another object (2 words, no spaces) 3. The Force of Gravity on Earth always points towards this location/spot. (2 words, no spaces) 4. A fundamental force that is responsible for transforming protons and neutrons into other particles. This is what we call radioactive (beta) decay. (2 words, no space) 5. 1 kgm/s/s 7. This Force always resists the motion/ or attempted motion of an object 9. The only of the 4 fundamental forces that only works in 1 direction (only attracts, never repels) 10. The Force of attraction that exists between any two objects due to their mass (3 words, no spaces) 14. Fancy word for an object that is not moving 15. A simple drawing of an object showing all forces acting upon that object (3 words, no spaces) 18. If the world were ____________________, you would not be able to move unless you pushed off something or grabbed a rope. (hint: ___less) 20. When you find the sum of numbers, you must ___ them 22. Name of force involved when a parachute is deployed; this force is when you "catch" the air, and resists your motion. (___Force.) 24. When you travel left, the slope of your position v time graph will be ________.